Col du Hundsruck

What to Expect on the Col du Hundsruck

The Col du Hundsruck sits in France and earns its Category 2 rating honestly. At 7.9 km with 668 m of total ascent, the climb delivers enough sustained work to test threshold fitness — but the average gradient of 5.08% flatters the road. The 18.28% maximum gradient tells a more honest story: this is not a steady grind. Somewhere on those 7.9 km, the road tilts into genuinely severe territory.

How the Gradient Unfolds

The average of 5.08% across the full length implies a moderate rhythm, but a peak of 18.28% means at least one ramp hits nearly four times that average. Climbs with this kind of gradient variance typically follow one of two patterns:

• A brutal early or mid-section that eases into a manageable upper half
• A rolling profile with one concentrated, wall-like pitch buried in the middle or late kilometres

Either way, do not pace the Hundsruck as a uniform effort. Treating the early kilometres too aggressively because the gradient feels comfortable will leave you in debt when the steep section arrives.

Pacing Strategy

With 668 m of total ascent over 7.9 km, this is a substantial effort — long enough that FTP is the appropriate ceiling for most of the climb, not a number to exceed early. A rough framework:

• Lower slopes (km 0–3): Keep power at or slightly below threshold. The road may feel easy here. Resist the temptation to push.
• Mid-climb: Watch for gradient ramps. If the 18.28% section appears here, shift early, maintain cadence, and avoid grinding a big gear into the pitch — that's where efforts unravel.
• Upper kilometres: With the hard terrain behind you (assuming the steep section is mid-climb), you can afford to push more aggressively toward the summit at 724 m elevation.

If you don't yet have a reliable FTP figure, use the FTP estimator before targeting this kind of climb.

Gearing Notes

The 18.28% maximum gradient demands respect at the cassette. Riders on compact chainsets (50/34) should ensure they have at least an 11-32 cassette available — a 34×32 combination gives you somewhere to go when the gradient spikes. On a standard chainset (53/39), a 32- or 34-tooth sprocket is close to mandatory unless you have the raw power to muscle through.

Spin into the steep section. A cadence collapse on an 18% ramp is difficult to recover from mid-pitch. Better to shift one gear earlier than you think necessary and maintain momentum through the worst of it.

Key Numbers at a Glance

• Length: 7.9 km
• Total ascent: 668 m
• Average gradient: 5.08%
• Maximum gradient: 18.28%
• Category: 2
• Country: France

The Col du Hundsruck rewards riders who respect the variance in its gradient rather than those who pace it by the average alone. Know where the hard section is, arrive at it with fuel in the legs, and shift before the road forces you to.